Games like Keysaster
Games like Keysaster include Outlast, Five Nights at Freddy's: Security Breach, Resident Evil 7 Biohazard, Resident Evil Village, and Poppy Playtime. We matched them by the tags players give Keysaster on Steam (Survival Horror, Horror, Action, Multiple Endings, and Supernatural): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Survival Horror · First-Person

Five Nights at Freddy's: Security Breach
Shared: Horror · Survival Horror · Multiple Endings

Resident Evil 7 Biohazard
Shared: Survival Horror · Horror · First-Person

Resident Evil Village
Shared: Survival Horror · Horror · Action

Poppy Playtime
Shared: Horror · Survival Horror · Singleplayer

Outlast 2
Shared: Horror · Survival Horror · Psychological Horror

Escape the Backrooms
Shared: Horror · Survival Horror · Psychological Horror

Lethal Company
Shared: Horror · Survival Horror · First-Person

Five Nights at Freddy's
Shared: Horror · Survival Horror · Psychological Horror

Darkwood
Shared: Survival Horror · Horror · Action

The Beast Inside
Shared: Horror · Survival Horror · Action

SILENT HILL 2
Shared: Horror · Survival Horror · Psychological Horror

The Forest
Shared: Horror · Survival Horror · Action

SOMA
Shared: Horror · Psychological Horror · Survival Horror

Resident Evil Requiem
Shared: Survival Horror · Horror · Action

Dark Deception
Shared: Horror · Survival Horror · Psychological Horror

Amnesia: The Dark Descent
Shared: Horror · Survival Horror · Psychological Horror

The Evil Within 2
Shared: Survival Horror · Horror · Action

Alien: Isolation
Shared: Survival Horror · Horror · Atmospheric

The Outlast Trials
Shared: Horror · Survival Horror · Psychological Horror

Bendy and the Dark Revival
Shared: Horror · Survival Horror · Action

Slender: The Arrival
Shared: Survival Horror · Horror · First-Person

Backrooms: Escape Together
Shared: Horror · Survival Horror · Psychological Horror

Garten of Banban
Shared: Horror · Psychological Horror · Survival Horror